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//create a personsomeone:=Person{Age:99,Name:"Gandalf",FriendsName: []string{"Frodo","Sam","Galadriel","Radagast"},MyHead:Head{Value:Brain{IQ:1000,//:)},},}newPerson:=someonenewPerson.Name="Saruman"
SQLite
SQLiteDB,err:=Orca.Use(Orca.SQLite,Orca.SetSQLiteOptions("sqlite3","./MyDb.db"))//get database_=errmyPersonList:=SQLiteDB.GetCollection(Person{},"Person")//if there is no table in the database to store a person, it creates it//if there is a table, it goes to the table and returns a collection of personmyPersonList.Add(someone)//it inserts person to databasemyPersonList.Update(someone,newPerson)//updated!myPersonList.Delete(newPerson)//newPerson deleted from database.myPersonList.Clear()//it delete all tuples in table(person table).myPersonList.ToSlice()//it return a slice of person
MongoDB
MyMongoDB,err:=Orca.Use(Orca.MongoDB,Orca.SetMongoDBOptions("mongodb://127.0.0.1","myMongo"))//get database_=errmyPersonList:=MyMongoDB.GetCollection(Person{},"Person")//if there is no collection in the database to store a person, it creates it//if there is a collection, it goes to the collection and returns a collection of personmyPersonList.Add(someone)//it inserts person to databasemyPersonList.AddRange(SliceOfPerson)//it inserts multiple person in one transactionmyPersonList.Update(someone,newPerson)//updated!myPersonList.Delete(newPerson)//newPerson deleted from database.myPersonList.Clear()//it delete all tuples in table(person table).myPersonList.ToSlice()//it return a slice of person
RedisDB
MyRedisDB,err:=Orca.Use(Orca.Redis,Orca.SetRedisDBOptions("localhost:6379","","0"))//get database_=errmyPersonList:=MyRedisDB.GetCollection(":","Person")//first parameter is seperator , second is relationmyPersonList.Add(Orca.NewRedisVariable{Key :"150316",Value :"Gandalf",ExpirationTime:0,})//it insert to database as => Key = Person:150316 and Value = Gandalf//so , result of the 'get "Person:150316"' code is "Gandalf".//if you do not want to use relation and seperator set empty all , example :myPersonList:=MyRedisDB.GetCollection("","")myPersonList.AddRange([]Orca.NewRedisVariable{...})//add multiple key and values to databasemyPersonList.Delete(...)//it delete from database.myPersonList.Clear()//it deletes only person if you use relation , otherwise it delete all key-value pairsmyPerson.Update(oldValue,newValue)//updated!
Memcache
Orca also support Add,AddRange,Clear,Delete,Update method for Memcache DB.The only difference between Redis and memcache usage is Orca.NewMemCacheVariable declaration for key-value pairs.But you can use Orca.NewMemCacheVariable in Redis operations or Orca.NewRedisVariable in Memcache operations.
Example :
MemCachedDB,err:=Orca.Use(Orca.MemCached,Orca.SetMemCachedDBOptions("localhost:11211"))_=errmyPersonList:=MemCachedDB.GetCollection(":","Person")//same features (seperator and relation)myPersonList.Add(Orca.NewRedisVariable{..})//correct!myPersonList.Add(Orca.NewMemCacheVariable{..})//correct!//others same...(AddRange,Clear,Update,Delete,ToSlice etc.)
LocalHook Usage in ORCA
Orca offers the programmer the following localhooks :
BeforeAdd
AfterAdd
BeforeAddRange
AfterAddRange
BeforeUpdate
AfterUpdate
BeforeDelete
AfterDelete
What is LocalHook ?
If you need run a method/function inside crud operation functions(Add,AddRange,Delete etc.) , you must use LocalHooks.
Orca.NewLocalHook : First parameter is LocalHook id (like key) , if you need to find your hook you need the key. Second parameter is Priority you can add many BeforeAdd hook , Orca execute all hooks in order. 0 is Higher priority. Third is Hook location (beforeAdd,afterAdd, etc.) The last is function.
LocalHook Example with SQLite
SQLiteDB,err:=Orca.Use(Orca.SQLite,Orca.SetSQLiteOptions("sqlite3","./MyDb.db"))//get database_=errSQLiteDB.AddLocalHook(Orca.NewLocalHook("myHook",0,Orca.BeforeAdd,func(iinterface{})interface{} {returni}))//add BeforeAdd localhook.//The function run before all add operations and it takes the value to be added parameter as empty interface.//you can add the other hooks using the same way.SQLiteDB.AddLocalHooks(...)//add multiple localhooks at same time.SQliteDB.DeleteHook(string)//delete hook using idSQliteDB.DeleteHooks(...string)//delete hooks
LocalHook usage is same for the other databases (RedisDB,MongoDB,Memcache...)
Generic Tools in ORCA
Orca offers 4 type of generic tool to manipulate results without change database.These Tools are :
LazyList : LazyList is lazy :) it does not perform until call Do function.It stores functions to execute after called do function.
LinkedList : A list implemented by using go/list package.
ImmutableList : ImmutableList is easy to make thread safe operations.Methods access the copy of the source.
MutableList :MutableList methods access the source using pointers.
mylist:=MutableList.NewMutableList(myPersonList.ToSlice())mylist.Where(func(xinterface{})bool {returnx.(Person).Age<30 })//it returns slice of person where age smaller than 30//and more (Contains,Distict,ElementAt,Exist,Foreach,RemoveAt,Skip,Take etc..)
